Home / 427,085.28-640,864.38-255,886.29

Finding the Fourth Proportional to 427,085.28, 640,864.38 and 255,886.29

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Solution

The fourth proportional to 427,085.28, 640,864.38 and 255,886.29 is: 383,971.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,085.28 : 640,864.38 = 255,886.29 : x
  2. Step 2: Convert to fraction form
    427,085.28/640,864.38 = 255,886.29/x
  3. Step 3: Cross multiply
    427,085.28x = 640,864.38 × 255,886.29
  4. Step 4: Simplify right side
    427,085.28x = 163,988,408,591.35
  5. Step 5: Solve for x
    x = 163,988,408,591.35/427,085.28
  6. Step 6: Final answer
    x = 383,971.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.